| Univariate analysis | Multivariate analysis | ||||
---|---|---|---|---|---|---|
 | Odds ratio | 95% C.I. | p-value | Odds ratio | 95% C.I. | p-value |
Age | Â | Â | < 0.001 | Â | Â | < 0.001 |
  < 50 years (standard) |  |  |  |  |  |  |
  ≥ 50 years | 2.553 | 1.642 – 3.970 |  | 2.312 | 1.472 – 3.630 |  |
Sex | Â | Â | 0.036 | Â | Â | Â |
  Woman (standard) |  |  |  |  |  |  |
  Man | 1.508 | 1.036 – 2.195 |  |  |  |  |
Body-mass index | Â | Â | 1.000 | Â | Â | Â |
  < 25 (standard) |  |  |  |  |  |  |
  ≥ 25 | 0.988 | 0.677 – 1.440 |  |  |  |  |
History of prior laparotomy | Â | Â | 0.491 | Â | Â | Â |
  No (standard) |  |  |  |  |  |  |
  Yes | 0.829 | 0.521 – 1.318 |  |  |  |  |
Preoperative leukocyte count (/mm3) | Â | Â | 0.001 | Â | Â | Â |
  < 10,000 (standard) |  |  |  |  |  |  |
  ≥ 10,000 | 1.928 | 1.307 – 2.844 |  |  |  |  |
Preoperative NLR | Â | Â | < 0.001 | Â | Â | 0.003 |
  < 3.0 (standard) |  |  |  |  |  |  |
  ≥ 3.0 | 2.482 | 1.696 – 3.633 |  | 1.876 | 1.246 – 2.825 |  |
Admission via ED | Â | Â | < 0.001 | Â | Â | 0.007 |
  No (standard) |  |  |  |  |  |  |
  Yes | 2.172 | 1.485 – 3.178 |  | 1.764 | 1.170 – 2.660 |  |
Approach of operative method* | Â | Â | 0.613 | Â | Â | Â |
  Conventional surgery |  |  |  |  |  |  |
  Reduced port surgery | 0.892 | 0.602 – 1.321 |  |  |  |  |